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(emit_reload_insns): If not -O, Don't try find_equiv_reg.

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(choose_reload_regs): If not -O, don't inherit reloads.

From-SVN: r2607
This commit is contained in:
Richard Stallman 1992-10-26 05:51:04 +00:00
parent 37548fa3f3
commit 58b1581b23
1 changed files with 9 additions and 4 deletions
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13
gcc/reload1.c
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@ -4288,9 +4288,13 @@ choose_reload_regs (insn, avoid_return_reg)
COPY_HARD_REG_SET (save_reload_reg_used_in_op_addr,
reload_reg_used_in_op_addr);
/* Try first with inheritance, then turning it off. */
/* If -O, try first with inheritance, then turning it off.
If not -O, don't do inheritance.
Using inheritance when not optimizing leads to paradoxes
with fp on the 68k: fp numbers (not NaNs) fail to be equal to themselves
because one side of the comparison might be inherited. */
for (inheritance = 1; inheritance >= 0; inheritance--)
for (inheritance = optimize > 0; inheritance >= 0; inheritance--)
{
/* Process the reloads in order of preference just found.
Beyond this point, subregs can be found in reload_reg_rtx.
@ -4763,7 +4767,8 @@ emit_reload_insns (insn)
register. */
if (reload_secondary_reload[j] >= 0
&& reload_secondary_icode[j] == CODE_FOR_nothing)
&& reload_secondary_icode[j] == CODE_FOR_nothing
&& optimize)
oldequiv
= find_equiv_reg (old, insn,
reload_reg_class[reload_secondary_reload[j]],
@ -4778,7 +4783,7 @@ emit_reload_insns (insn)
or has yet to be emitted, in which case it doesn't matter
because we will use this equiv reg right away. */
if (oldequiv == 0
if (oldequiv == 0 && optimize
&& (GET_CODE (old) == MEM
|| (GET_CODE (old) == REG
&& REGNO (old) >= FIRST_PSEUDO_REGISTER